javax.management
Class AttributeChangeNotification

java.lang.Object
  |
  +--java.util.EventObject
        |
        +--javax.management.Notification
              |
              +--javax.management.AttributeChangeNotification

public class AttributeChangeNotification

extends Notification

Provides definitions of the attribute change notifications sent by MBeans.

It's up to the MBean owning the attribute of interest to create and send attribute change notifications when the attribute change occurs. So the NotificationBroadcaster interface has to be implemented by any MBean for which an attribute change is of interest.

Example: If an MBean called myMbean needs to notify registered listeners when its attribute:

String myString

is modified, myMbean creates and emits the following notification:

new AttributeChangeNotification(myMbean, sequenceNumber, timeStamp, msg, "myString", "String", oldValue, newValue);

See Also:

Serialized Form

Field Summary

static java.lang.String

ATTRIBUTE_CHANGE Notification type denoting that the observed MBean attribute value has changed.

Fields inherited from class javax.management.Notification

source

Fields inherited from class java.util.EventObject

source

Constructor Summary

AttributeChangeNotification(java.lang.Object source, long sequenceNumber, long timeStamp, java.lang.String msg, java.lang.String attributeName, java.lang.String attributeType, java.lang.Object oldValue, java.lang.Object newValue)
Creates an attribute change notification object.

Method Summary

java.lang.String	getAttributeName() Gets the MBean attribute name.
java.lang.String	getAttributeType() Gets the MBean attribute type.
java.lang.Object	getNewValue() Gets the MBean attribute new value as Object
java.lang.Object	getOldValue() Gets the MBean attribute old value as Object.

Methods inherited from class javax.management.Notification

, getMessage, getSequenceNumber, getSource, getTimeStamp, getType, getUserData, setSequenceNumber, setSource, setTimeStamp, setUserData

Methods inherited from class java.util.EventObject

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ATTRIBUTE_CHANGE

public static final java.lang.String ATTRIBUTE_CHANGE

Notification type denoting that the observed MBean attribute value has changed. The value of this notification type is jmx.attribute.change.

Constructor Detail

AttributeChangeNotification

public AttributeChangeNotification(java.lang.Object source,
                                   long sequenceNumber,
                                   long timeStamp,
                                   java.lang.String msg,
                                   java.lang.String attributeName,
                                   java.lang.String attributeType,
                                   java.lang.Object oldValue,
                                   java.lang.Object newValue)

Creates an attribute change notification object. In addition to the information common to all notification, the caller must supply the name and type of the attribute, as well as its old and new values.

Parameters:

source - The notification producer, that is the MBean the attribute belongs to.

sequenceNumber - The notification sequence number within the source object.

timeStamp - The notification emission date.

msg - The notification message.

attributeName - The MBean attribute name.

attributeType - The MBean attribute type.

oldValue - The MBean attribute old value.

newValue - The MBean attribute new value.

Method Detail

getAttributeName

public java.lang.String getAttributeName()

Gets the MBean attribute name.

Returns:

The MBean attribute name.

getAttributeType

public java.lang.String getAttributeType()

Gets the MBean attribute type.

Returns:

The MBean attribute type.

getOldValue

public java.lang.Object getOldValue()

Gets the MBean attribute old value as Object.

Returns:

The MBean attribute old value.

getNewValue

public java.lang.Object getNewValue()

Gets the MBean attribute new value as Object

Returns:

The MBean attribute new value